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AD8842AR-REEL
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Product Detailed Parameters
- Description：IC DAC 8BIT V-OUT 24SOIC
- Series：TrimDAC®
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Number of Bits：8
- Number of D/A Converters：8
- Settling Time：5.4µs (Typ)
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External
- Voltage - Supply, Analog：±5V
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：±0.2, ±0.4
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：24-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：24-SOIC
- Mounting Type：Surface Mount
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Overview
The AD8842AR-REEL is an 8-bit, 8-channel digital-to-analog converter (DAC) featuring four-quadrant multiplying capability. It operates from ±5 V supplies, providing a ±3 V output swing and replacing mechanical trimmers. The device uses a 3-wire serial interface with a 500 kHz update rate and includes a current conveyor amplifier for constant input resistance. Key electrical parameters include a 50 kHz full-power bandwidth, 2 LSB full-scale gain error, and 95 mW power dissipation at ±5 V.
Feature Summary
- Eight independent channels with 4-quadrant multiplying functionality
- 3-wire serial interface supporting daisy-chaining via SDO pin
- Low zero output error with midscale preset to 0 V
- Current conveyor amplifier design ensures constant input resistance
Applications
- Automatic adjustment systems
- Trimmer replacement in circuit designs
- Vertical deflection amplitude adjustment
- Waveform generation and modulation
Procurement Notes
Verify the REEL suffix indicates tape-and-reel packaging for surface-mount SOL-24 components. Confirm RoHS compliance status if environmental regulations apply, as standard parts may differ from Z-suffix variants. Ensure supply voltage matches the required ±5 V specification for optimal performance.
Selection Notes
Select this component when multiple independent analog signal adjustments are needed without mechanical potentiometers. It is suitable for AC or DC signals up to 50 kHz. Consider the SOL-24 package for space-constrained PCB layouts. Verify that the microprocessor can drive the 3-wire serial interface timing requirements.
Part Context
This part belongs to the AD8842 TrimDAC family, designed to replace multi-turn potentiometers. It is pin-compatible with the DAC8840 but offers lower cost and specific CMOS characteristics. The device integrates eight DACs with buffered outputs, simplifying system architecture by eliminating external buffer amplifiers.
Replacement Considerations
Pin-compatible with DAC8840. For single-supply applications, consider the DAC-8841. Check for RoHS compliance requirements; use AD8842ARZ-REEL if lead-free certification is mandatory.
